Deep-well pump.



A. C. TERKELSON.

DEEP WELL PUMP.

APPLICATION FILED JAN. 21, 1913.

1,097,376. Patented May 19, 1914.

4 3 SHEETS-SHEET l.

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A. G. TERKELSON.

DEEP WELL PUMP.

APPLIOATION FILED JAN. 21, 1913.

1,097,376. Patented May 19, 191;

8 SHEETSSHEET 2.

A TTOR/VEY 7 COLUMBIA PLANOGRAP" co., WASHINGTON, D. c.

A. C. TERKELSON.

DEEP WELL PUMP.

APPLICATION FILED JAN. 21, 1913.

1,097,876, Patented May 19, 1914.

3 SHEETSSHEET 3.

clu cii edh 3 WITNESSES: R: INVENTOR A TTOR/VE CQLUMEIIA pLANoaR/mn COWASHINGTON, D c.

ALBERT GRIST TERKELSON, OF OAKLAND, CALIFORNIA.

DEEP-WELL PUMP.

Application filed January 21, 1913.

Specification of Letters Patent.

Patented May 19, 1914-. Serial No. 743,301.

To all 'LU/LO'HL it may cancer 12.:

Be it known that I, ALBERT Cius'r TrimmisoN, a citizen of the UnitedStates, residing at Oakland, in the county oi Alameda and State ofCalifornia, have invented new and useful Improvements in Deep-V3 ellPumps, of which the following is a specification.

This invention relates to pumps and particularly to double-acting,continuous discharge, deep well pumps.

The object of this invention is to provide a double-acting, continuousdischarge pump of such construction as to eliminate rigid pumprods andtheir transverse guides; to overcome the use of friction creatingtransmission devices, and to provide a pump structurally capable ofincreased speed over rod pumps and of greater stroke; and operablereadily in distorted well.

The invention consists in the construction and details thereof.

Figure 1 is a general elevational view of the pump. Fig. 2 is a generalplan of Fig. 1. Fig. 3 is an elevational sectional. view of the casing,tube and cylinders. Fig. 41 is a detail sectional View of the casing,tube and cylinders. Fig. 5 is a detail sectional view of the liftmechanism. Fig. 6 is a plan of the lift mechanism. Fig. 7 is a sectionaldetail of shipper cam and driver sheave. Fig. 8 is a sectional detail ofshipper cam in releasing action. Fig. 9 is a sectional detail of asheave. Figs. 10 to 16 inclusive are diagrammatic views showingpositions of coordinate parts during one cycle of the counter shaft, thesheave being shown disalined for clearness.

In Figs. 1, 3 and l: a well A is shown having a discharge tubing 2 withan outlet connection 3 at the top and a seat or bushing a at the bottom.Resting on the seat 4 is a cylinder 5 of somewhat less than the size ofthe tubing 2, which latter is jointed adjacent the top of cylinder 5 bya nipple G with an inner annular groove 7 into which is snapped acylinder locking springdatch or detent 8 carried by the cylinder 5,which is adapted to be lowered or lifted at will from the well pipe 2.The latch 8 is provided with a lever 9, or other means, which iscooper-able with a part of the apparatus to be hereinafter describedwhen it is desired to unlatch the cylinder to permit its removal. Withinthe cylinder .1 are reciprocating up per and lower pistons B and C respectively, of suitable diameters and common axis, and having valves 11closable on the upward pumping stroke ot the pistons. Each piston isprovided with a radial arm 12 projecting into respective slots orchannels 13 of the cylinder 5 and preventing circumferential movement ofthe pistons relative to the cylinder, which is held against such motionin the tubing by a suitable stop device as 1 1 ()ne of the importantfeatures of the present invention is the means for operating thepistons, both as to the manner and time. This means consists of aflexible material of relatively great tensile strength for itsproportions, preferably being steel cable, a section 1 1- of which isextended down into the well passing thence through the upper piston l3and connecting with the piston G at a bridge or part 15 thereof. Thecable section 14 at the top of the well runs over guidepulley 16 at thehead frame 17, thence to a winding device 18 here shown as a halt sheavemounted on acenter shaft 19, having a fast gear 20 driven from a driveshaft 21. lVhile it is possible to use a single cable section also tolift the upper piston l3 I prefer to connect to the piston B at equalspaced positions, a plurality of cable stretches as 22-23, for thereason that a more direct application of force is had and side thrust iseliminated since the pull. is balanced on each side of the piston. Thestetches :22-23 join at the top of the well into a short single lead 24:which runs over a head pulley 25, thence to a winding sheave 26 on shaft19. Inasmuch as the cables 1%, 22 and 23 have no downward drivingfunction as to their respective pistons, and for the purpose of insuringthe positive and regular down stroke of'the pistons without dependingentirely on gravitation, it isdesirablc and advantageous to, connect thepistons by a means permitting and producing sinuiltaneous opposite orcoincident movement in the same direction. For the accomplishment ofthis function and operation, there is attached to the bottom oil theupper piston B one or more stretches of a flexible connection, asa cable27 which is led down through the piston C and securely attached to ayoke 28, from which it runs over a pulley block 29; thence upward to andover a guide pulley 30 on the yoke 28, fast to cable 27, and

finally connecting centrally to the lower portion of the piston G. Thespecial arrangement of the drag cable 27 is purposely to avoid, as faras possible, all side thrust or pressure in the operation of the parts.

Any suitable mechanism may be utilized for intermittently hauling ordrawing up the piston cables is and 24 (2223) in given time, order andspeed, and I have shown one means of doing so consisting of the sheaves18 and 26 on shaft 19. For practical reasons it is desi'able that thepower mechanism operate with a continuous rotary motion, while thepistons are given a reciprocating action, and it is particularlydesirable that the pistons be given such motion that a portion of theirupward travel will be coincident, or in other words the pistons at onetime will be in unidirectional motion. The desired motion may be had bymounting the sheaves 18 and 26 loosely on the shaft 19 and arrangingappropriate clutches as 31 on the shaft for driving engagement withtheir respective sheaves, each of which has a lug 32, Figs. 5, 6 and 9,engageable with a clutch 31. The clutches 31 are slidably set on theshaft each with a dog 33 at opposite sides of the shaft (see Figs. 10 to16), and to each sheave is attached respective cables suspending theirpistons at appropriate distance and relative positions in the cylinder5, as seen in Fig. 10, with one piston C at its lower limit and theother B rising, and the dogs 33 of the clutches in driving engagementwith their sheaves. After the piston B moves from position in Fig. 10 toFig. 11, its clutch 3133 is disengaged by any suitable device, as ashipper 3a actuated in proper time from a controller here shown as a cam35 on shaft 19, whereupon the released sheave will automatically swingback (Fig. 12) opposite to rotation of shaft 19, slack up cable 2st, andallow the piston B to descend. As piston B descends, piston C is beinglifted by the cable 14. and sheave 18 driven by its respective clutch3133, which will be disengaged in due time by its shipper 3st to releasesheave 18 when piston C is at its top limit of stroke. This orderly riseand fall of the two pistons is made positive by the connection 27attached to the pistons and playing on the pulley block 29 below. If thepistons B and C constantly moved in opposite directions, at the momentof reversal of travel there would occur a cessation of upward flow ofliquid in the discharge tube 2, and to avoid this and to obtain acontinuous discharge from the pump, I so design and arrange the partsthat for a portion of a cycle of shaft 19 the pistons will risecoincidently at a uniform or differential speed as desired. To that endthe sheaves l8 and 26 are designed to lift the pistons equal lengthstrokes though the pistons are so relatively positioned that before onereaches its upper limit, the other will start its upward movement fromlowermost position.

Inasmuch as the pistons are connected by the drag-cable 27 rove in thepulley 29, and since the pistons move in one direction for a period, itis necessary that some means be provided for compensating or yielding,so that the drag-cable will allow the pistons to momentarily changetheir normal relations during travel in opposite directions. I obtainthis compensation by mounting the pulley 29 for movement relative to thecylinder 5. The pulley is journaled upon a hearing 35 on the upper endof piston rod 36 of a piston 37 operable in a cylinder 38. The cylinder38 is securely attached to the bottom of cylinder 5 and has a duct 39communicating with the chamber between the tubing 2 and the cylinder 5,so that liquid at pressure of the discharge head enters the cylinder 38and is operative upon the piston 37, holding this down until such timesas the two pumping pistons B and C are both rising, when the drag-rope27 will act a a rigid link between the pistons B C and 37, lifting thelatter a distance approximately equal to the distance of imidirectionaltravel of pistons B and C. Differential speed of simultaneous upwardmovement of the pistons B and G is provided for, both by the running ofthe drag-cable 27 on its sheave 29 and by the differential piston 37.This piston is of suiiicient diameter under a given head in thedischarge pipe to overcome friction of the operating parts in the barrelof cylinder 5, and automatically descend as the two pistons B and Ccease simultaneous up ward mov ment and one or the other oescends. Thepiston 37 has suitable means, as pins 40, running in guideways n of thecylinder 38 for preventing its turning in the cylinder and twisting thedrag-cable. hen the two pistons B C begin to rise together, the load ofliquid lifted will be transferred from the slower to the faster movingone, and the latter will then subject its lifting cable to a greaterstrain, which will give a stretch somewhat in the direction of the load.To offset this tendency of reduction of upward movement by stretching ofcable, I so proportion the lifting sheaves that the automatical upwardstroke is somewhat at accelerated speed, the acceleration neutralizingthe stretch and giving the cable a normal predetermined or mean speed.

it will be seen that by my construction I eliminate side thrusts andtherefore avoid the use of bearings and guides to resist the same, and,further, at no time is either of the pistons lift devices, cables H2t inmy invention, subject to compression as in stiffrod connections 011 thedown stroke of piston.

Because of the much lighter construction of all reciprocating parts ofmy pump, there will be less inertia to contend with on the down strokeat a given piston speed, and therefore as the capacity of the pump isdetermined by the speed of the down stroke, this pump can be workedfaster and at increased capacity. The reciprocating parts arecounterbalanced at the head works by a weight 45 attached to a cable, orequivalent, 46 secured on a part of respective sheaves 18-26.

The continuity of load on the pumping pistons relieves the power head ofvarying shocks, and an additional advantage of my pump is that a greatdeal of time is saved when, for any reason, itis necessary to removeelements of the structure from the well, as there are no joint of stiifrods to unscrew or break. As it is ditiicult to drill a deep well plumb,and because of frequent deviation from a plumb line, stifhrod pistonsoften jam or run with great friction, and by my construction and theemployment of a flexible haul member, it is possible to pump from verydisalined and deep wells in which a still" rod pump could not beemployed.

For the protection of the substructure against loss by rupture of thehaul cables 14e-2i, a safety joint in their length at the head gear maybe provided, which will give way before a breaking steam produced in thecables in the well. Until a suflicient head has accumulated in thedischarge pipe 2 to drive down the differential piston 37, the pistons"BU are operated without the overlap-stroke, each piston moving oppositeto the other throughout the reciprocations.

Referring to Figs. 10-16, as piston B approaches limit of lip-stroke,piston 0 begins to rise and take the load from piston B, the speed ofwhich diminishes, while C accelerates until all the load is off B, thecable of which can be readily released by its shipper clutch. At therelease of piston B the differential block 29 drops a distance equal tothe lap-stroke of pistons and pulls the piston B down twice as far, asin Fig. 19, the latter reaching the bottom limit of Fig. 18 before C hasceased upward stroke.

.lt is understood. that i may employ any appropriate and convenientmeans, operating with the same function, in lieu of the simple form ofconnection directly between the piston B C for obtaining reverse orpositive downward movement.

Having thus described my invention, what I claim and desire t secure byLetters Patent is:

1. In a deep well pump the combination of a discharge pipe, a cylinderfitted in a lower portion of the discharge pipe, tandem reciprocalpistons running .in the cylinder and having upwardly opening valves, apower-head consisting of a mechanism for intermittently elevating eachpiston in the cylinder and a bendable tension lift connecting the headgear mechanism with the piston and devices for moving the pistonsunidirectionally during a portion of their cycles.

52'. In a deep well pump the combination with an intermittentlyoperating lift mechanism of a bendable lifting structure intermittentlyhauled by said mechanism, a plurality of reciprocating pistons connectedto said mechanism by said lift structure, auto matically operatingvalves on the pistons and a relatively stationary barrel in which saidpistons are arranged in tandem and reciprocate and devices for movingthe pistons unidirectionally during a portion of their cycles.

3. The combination in a deep well pump, of the discharge pipe, aplurality of reciprocating tandem pistons operable in the lower portionof the pipe, a piston lift mechanism, and means connecting said pistonand said mechanism for operating the pistons comprising tension,flexible, haul members connected to their respective pistons and saidmechanism and devices for moving the pistons imidirectionally during aportion of their cycles.

4t. The combination in a deep well pump, of the discharge pipe, aplurality of reciprocating pistons operable in tandem in the lowerportion of the pipe; a piston lift mechanism and means connecting saidpistons and said mechanism for operating the pistons comprising tension,flexible, haul members connected to their respective pistons and saidmechanism; said mechanism operating to lift up one of the pistonsthrough the tension lift connection, while drawing the other piston downand devices for moving the pistons unidirectionally during a portion oftheir cycles.

5. A deep well pump comprising a discharge tube, a plurality of tandempistons operated in the lower portion of the tube; and means wherebysaid pistons are operated oppositely sinniltaneously; said meanscomprising a power mechanism, flexible, lift, tension members connectingsaid pistons with the power mechanism, for hauling actuation thereby,and a tension connection between each of the pistons for controlling thedownward motion of the same and devices for moving the pistonsunidirectionally duringa portion of their cycles.

6. In a pump, a discharge tubing, a plurality of pistons operable in thelower portion of the tubing, and a power mechanism whereby said, pistonsare siu'lnltaneously &

moved oppositely for a considerable portion of their stroke andsubsequently in the same direction for the remainder of their strokes;said means comprising intermittently operative and automaticallyreleasing members, and lift tension elements connecting said members andthe pistons, and a connection between the lstons for keeping thedownwardly moving elements under tension during operation.

'7. In a pump, in combination with a power mechanism, a plurality ofpistons, a discharge tube in the lower portion of which the pistonsoperate, flexible tension members connecting the pistons and the powermechanism and a yieldable flexible connection between said pistons,whereby during the upward stroke of one of the pistons, the other pistonis positively operating during the descending stroke and its flexiblelift member maintained in tension.

8. In a pump in combination with a power mechanism, a plurality ofpistons, a discharge tube in the lower portion of which the pistonsoperate, flexible tension members connecting the pistons and the powerlnecln anism, and a yieldable flexible connection between said pistons,whereby during the upward stroke of one of the pistons, the other pistonis positively operated during the descending stroke and lLS lbXilJlQlift member maintained in tension; said power mechanism operating toactuate the pistons oppositely for the larger portion of their strokesand simultaneously in the same direction for the remaining portion oftheir strokes, during which latter the yieldable lexible connectionfollows both pistons in directional movement.

5). In a pump in combination with a well tubing, a plurality of pumpingpistons oper able in tandem in the lowe" portion of the tubing, acontinuously rotating power shaft, lifting sheaves loosely mounted onthe shaft clutches for the respective sheaves whereby the latter aremoved uniformly with the shaft for a portion of its cycle and releasefor reversal relative thereto, and flexible haul connections betweensaid pistons and said sheav-s whereby when the sheaves are actuated withthe shaft, the pistons are raised, and a yieldable, tension deviceconneeting the pistons.

10. In pump in combination with a well tubing, a plurality of pumpingpistons operable in the lower portion of the tubing, a continuouslyrotating power shaft; lifting sheaves loosely mounted on theshaftclutches for the respective sheaves wheiwliy the latter are moveduniformly with a shaft for a portion of its cycle and released lflesible haul reve sal relative thereto, ant connections between saidpistons and said sheaves whereby when the sheaves are actuated with theshaft, the pistons are raised,

noensvc and a yieldable. connection between said pistons whereby whenone of the pistons is lifted by its respective driven sheave, the otherpiston is mechanically lowered synchronously.

11. in a pump in combination with a well tubing, a plurality of pumpingpistons operable in the lower portion of the tubing, a continuouslyrotating power shaft, lifting sheaves with a balance loosely mounted onthe shaft, clutches for the respective sheaves whereby the latter aremoved uniformly with a shaft for a portion of its cycle and released forreversal relative thereto, flexible haul connections between saidpistons and said sheaves whereby when the sheaves are actuated with theshaft, the pistons are raised, and a yieldable connection between saidpistons whereby when one of the pis tons is liit d by its respectivedriven sheave, the other piston is mechanically lowered synchronously,said connection including acable attached to the pistons and a pulley)lGCli over which the cable is rove.

2. In a pump in combination with a well tubing, a plurality of pumpingpistons operable in the lower portion of the tubing, a continuouslyrotating power shaft, lifting sheaves loosely mounted on the shaft;clutches for the respective sheaves whereby the latter are moveduniformly with a shaft for a portion of its cycle and released forreversal relative thereto, and flexible haul connections between saidpistons and said sheaves whereby when the sheaves are actuated with theshaft the pistons are raised, and connection between said pistonswhereby when one of the pistons is lifted by its respective drivensheave, the other piston is mechanically lowered synchronously, saidconnection including a. cable attached to the pistons and a pulley blockover which the cable is rolled; the relation of the loose sheaves ontheir shaft and the pistons being such that during one cycle of thesheave shaft, the istons will be moved oppositely and will su sequent-1ybe moved in the same direction.

13. In a deep well pum I the combination wi h discharge tube, of aplurality of pistl rein, a lift mechanism, erzible tension in inbersconnected respecively to said pistons and to respective eleients of thelift mechanism, said elements i ing of intermittently driven sheavesmounted on a driving shaft for "er --.tely lifting and permitting thedownerd movement of their respective pistons aid for simultaneouslymoving the pistons common direction for a portion of strokes, saidsheaves being so designed nutralize the stretching effect of the liftelement as the faster upwardly moving piston takes the loao. from theslower upmoving piston.

let. In a deep well pump the combination with a discharge tube, of aplurality of pistons operating therein, a lift mechanism, flexibletension members connected respee" tively to said pistons and torespective elements of the lift mechanism, aid elements consisting ofintermittently driven sheaves loosely mounted on a driving shaft foralternately lifting and permitting the downward movement of theirrespective pistons and for simultaneously moving the pistons in a commondirection for a portion of their strokes, and a means for positivelyactuating the alternately descending pistons and keeping the liftingelement in tension and automatically compensating when the pistons moveupwardly in the same direction.

15. in a deep well pump the combination with a discharge tube, of aplurality of pistons operating therein, a lift mechanism, flexibletension members connected respectively to said pistons and to respectiveelements of the lift mechanism, said elements consisting ofintermittently driven sheaves loose on a driving shaft for alternatelylifting and permitting the downward move ment of their respectivepistons and for simultaneously moving the pistons in a con mon directionfor a portion of their strokes, and a means for positively actuating thealternately descending pistons and keeping its lifting element intension and auttnnatically compensating when the pistons move upwardlyin the same direction, said actuator including a flexible elementattached to the pistons and being mounted for operztion upon a yieldableautomatically operable support.

16. ln a deep well pump, the combina tion of a discharge pipe, acylinder adjustable therein, tandem pistons in. the cylinder withvalves, means for moving the pistons oppositely and unidirectiomilly inone cycle of said means, and a yieldable follower connected to saidpistons for keeping the piston opera ing means under tension duringdownward stroke.

1?. in a deep well pump, the combination of a discharge pipe, avalveless cylinder adjustable therein, tandem pistons in the cylinderwith valves, means for moving the pistons oppositely andunidireetionally in one cycle of said means, and a yieldable followerconnected to said pistons for keeping the piston operating means undertension during downward stroke.

18. lln a deep well pump, the combination of a discharge pipe, acylinder adjustable therein, tandem pistons in the cylinder with valves,means for moving the pistons oppositely and unidirectionally in onecycle of said means, and a yieldable follower connected to said pistonsfor keeping the piston operating means under tension during downwardstroke, said follower being subjected to hydraulic pressure.

19. in a deep well pump, the combination of a discharge pipe, a cylinderadjustable therein, tandem pistons in the cylinder with *alves, meansfor moving the pistons oppositcly and unidirectionally in one cycle ofsaid means, and a yieldable follower connected to said pistons forkeeping the piston operating means under tension during downwardSL-L'OliG, said follower being subjected to hydraulic pressure forautomatic return movement.

20. in a deep well pump, the combination of a discharge pipe, tandempistons at the lower portion thereof with valves, 21 power headcoi'isisting of a mechanism for moving the pistons oppositely andsimultaneously unidirectionally during one cycle of said head, and afollower connected to said pistons for keeping the piston operatingmeans under tension during downward stroke.

21. In a deep well pump, the combination of a discharge pipe, tandempistons at the lower portion thereof with valves, a power headconsisting of a mechanism for moving the pistons oppositely andsimultaneously unidirectionally during one cycle of said head, aconnection between said pistons whereby power is transmitted from the upwardly moving piston to the downwardly moving one for positivelyoperating the same, and a follower to which said connection is attachedwhereby said connection is allowed to move up when the pistons moveunidirectionally.

In testimony whereof l have hereunto set my hand in the presence of twosubscribing witnesses.

ALBERT CREST llEl-tKELSbrl.

lVit-nesses Jonn ll. Hnnmno,

V. W. IIEALEY.

Gopies of this patent may he obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, ll. 6.

